Alterna LVT Flooring from Armstrong
I am laying Alterna LVT over a vinyl tile, self-stick, floor. Floor is level and the old tile is well bonded. Armstrong recommends using their S-194 Patch Underlayment Leveler, but I cannot find it in my area's stores.
Question is: Can I use Henry 547 Universal Patch & Skimcoat or their 549 FeatherFinish, instead of the S-194? And which one will work the best (547 vs. 549)?
Thanks in advance.